{"product_id":"rock-krawler-rkrrk06014p-4-5in-rear-coil-springs-jeep-wrangler-jku","title":"Rock Krawler 4.5in Rear Triple Rate Coil Springs for 2007-2018 Jeep Wrangler JKU 4DR","description":"\u003ch4\u003eMaximum Articulation Rear Coil Springs for the Four-Door Jeep Wrangler JKU\u003c\/h4\u003e\u003cp\u003eThe Rock Krawler RKRRK06014P provides 4.5 inches of rear lift for the 2007 to 2018 Jeep Wrangler JKU four-door through a proven triple rate coil spring design. The RKRRK06014P is engineered to deliver a comfortable on-road driving experience while supporting maximum rear axle travel for technical off-road terrain. Rock Krawler's triple rate architecture prevents spring unseating at full droop and minimizes settling over time, ensuring the stated lift height is maintained throughout the spring's service life.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e4.5 inch rear lift height for 2007-2018 Jeep Wrangler JKU 4-Door\u003c\/li\u003e\n\u003cli\u003eTriple rate design for on-road comfort and off-road articulation\u003c\/li\u003e\n\u003cli\u003eBlack powder coat finish for corrosion resistance\u003c\/li\u003e\n\u003cli\u003eNo drilling or modification required\u003c\/li\u003e\n\u003cli\u003e5-year warranty coverage\u003c\/li\u003e\n\u003cli\u003eSold as a pair\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eVehicle Fitment\u003c\/h4\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eYear Range\u003c\/th\u003e\n\u003cth\u003eMake\u003c\/th\u003e\n\u003cth\u003eModel\u003c\/th\u003e\n\u003cth\u003eTrim\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\u003ctr\u003e\n\u003ctd\u003e2007-2018\u003c\/td\u003e\n\u003ctd\u003eJeep\u003c\/td\u003e\n\u003ctd\u003eWrangler\u003c\/td\u003e\n\u003ctd\u003eJKU 4-Door\u003c\/td\u003e\n\u003c\/tr\u003e\u003c\/tbody\u003e\n\u003c\/table\u003e\u003ch4\u003eSpecifications\u003c\/h4\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eDetail\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003ePart Number\u003c\/td\u003e\n\u003ctd\u003eRKRRK06014P\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eRock Krawler\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLift Height\u003c\/td\u003e\n\u003ctd\u003e4.5 inches\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLocation\u003c\/td\u003e\n\u003ctd\u003eRear\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSpring Type\u003c\/td\u003e\n\u003ctd\u003eTriple Rate\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFinish\u003c\/td\u003e\n\u003ctd\u003eBlack Powder Coat\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eQuantity\u003c\/td\u003e\n\u003ctd\u003ePair (2 springs)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWarranty\u003c\/td\u003e\n\u003ctd\u003e5 Year\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFitment\u003c\/td\u003e\n\u003ctd\u003e2007-2018 Jeep Wrangler JKU 4-Door\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCondition\u003c\/td\u003e\n\u003ctd\u003eNew\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUPC\u003c\/td\u003e\n\u003ctd\u003eN\/A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003ch4\u003eWhat's Included\u003c\/h4\u003e\u003cul\u003e\u003cli\u003eRock Krawler RKRRK06014P triple rate rear coil springs (pair)\u003c\/li\u003e\u003c\/ul\u003e\u003ch4\u003eAbout Rock Krawler\u003c\/h4\u003e\u003cp\u003eRock Krawler is a suspension engineering company based in Vermont with a singular focus on Jeep suspension systems. Their triple rate coil spring technology is the foundation of their complete JK and JL suspension lift systems, used by thousands of JKU owners across every terrain type.\u003c\/p\u003e\u003ch4\u003eRelated Parts on Our Site\u003c\/h4\u003e\u003cul\u003e\u003cli\u003e\u003ca href=\"\/collections\/jeep-suspension\"\u003eJeep Wrangler Suspension Lift Parts\u003c\/a\u003e\u003c\/li\u003e\u003c\/ul\u003e\u003ch4\u003eFrequently Asked Questions\u003c\/h4\u003e\u003cstrong\u003eWhat is the RKRRK06014P?\u003c\/strong\u003e\u003cp\u003eThe Rock Krawler RKRRK06014P is a pair of triple rate rear coil springs providing 4.5 inches of lift for the 2007 to 2018 Jeep Wrangler JKU four-door platform. They are designed for both street and off-road use with a progressive spring rate that maximizes axle articulation.\u003c\/p\u003e\u003cstrong\u003eDoes the RKRRK06014P fit both Rubicon and Sport JKU models?\u003c\/strong\u003e\u003cp\u003eYes. The RKRRK06014P fits all 2007 to 2018 Jeep Wrangler JKU four-door models including Sport, Sahara, and Rubicon trim levels, which share the same rear coil spring dimensions.\u003c\/p\u003e\u003cstrong\u003eWhat is the difference between the RKRRK06014P 4.5in and the RKRRK02001P 3.5in rear coil option?\u003c\/strong\u003e\u003cp\u003eThe RKRRK06014P provides 4.5 inches of rear lift, making it suitable for more aggressive builds with larger tires and higher clearance requirements. The 3.5 inch option is typically paired with front springs for moderate lift builds, while 4.5 inch rear springs are common in full suspension lift system configurations.\u003c\/p\u003e\u003cstrong\u003eWill the RKRRK06014P coil springs work with factory JKU shocks?\u003c\/strong\u003e\u003cp\u003eFactory shocks are not long enough to take full advantage of the travel available with a 4.5 inch lift coil spring. Rock Krawler recommends replacing shocks with extended travel units appropriate for the lift height to prevent coil unseating and ensure proper handling.\u003c\/p\u003e\u003cstrong\u003eDo I need correction arms with the RKRRK06014P?\u003c\/strong\u003e\u003cp\u003eAt 4.5 inches of rear lift, control arm correction is typically recommended to restore proper pinion angle and prevent driveline vibration on the JKU. Consult Rock Krawler for their recommended control arm pairings at this lift height.\u003c\/p\u003e\u003cstrong\u003eIs the RKRRK06014P suitable for the two-door JK Wrangler?\u003c\/strong\u003e\u003cp\u003eThe RKRRK06014P is specifically designed for the four-door JKU Wrangler. Rock Krawler offers separate rear coil spring applications for the two-door JK with different geometry requirements.\u003c\/p\u003e\u003cstrong\u003eWhat tire size is compatible with the RKRRK06014P on a stock JKU?\u003c\/strong\u003e\u003cp\u003eA 4.5 inch rear lift combined with an appropriate front lift typically supports 37 inch tires on a stock-width JKU axle, though fender and body trimming may still be required for full lock-to-lock clearance. Always verify clearance with your specific build configuration.\u003c\/p\u003e\u003cstrong\u003eHow do the Rock Krawler RKRRK06014P springs compare to factory JKU rear springs?\u003c\/strong\u003e\u003cp\u003eThe RKRRK06014P provides significantly more lift and articulation than the factory JKU rear springs. The triple rate design offers better off-road flex while maintaining a smoother street ride than single-rate lift springs of equivalent height.\u003c\/p\u003e\u003ch4\u003eInstallation Instructions\u003c\/h4\u003e\u003col\u003e\n\u003cli\u003eSafely lift and support the rear of the Jeep Wrangler JKU on jack stands with the axle hanging freely.\u003c\/li\u003e\n\u003cli\u003eSupport the rear axle with a floor jack.\u003c\/li\u003e\n\u003cli\u003eDisconnect the rear sway bar end links and lower the axle to release the factory coil springs.\u003c\/li\u003e\n\u003cli\u003eRemove the OEM rear coil springs and any factory isolators.\u003c\/li\u003e\n\u003cli\u003eInstall the Rock Krawler RKRRK06014P triple rate springs, ensuring they seat correctly in the upper and lower perches.\u003c\/li\u003e\n\u003cli\u003eRaise the axle, reconnect the sway bar end links, and reinstall the rear shocks if previously removed.\u003c\/li\u003e\n\u003cli\u003eLower the vehicle and check ride height before performing a professional alignment.\u003c\/li\u003e\n\u003c\/ol\u003e","brand":"Rock Krawler","offers":[{"title":"Default Title","offer_id":46059358912591,"sku":"RKRRK06014P","price":240.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1062\/7920\/files\/Rock_Krawler_2.5in_Coils_Jeep_Wrangler.png?v=1784217511","url":"https:\/\/www.blackopsautoworks.com\/products\/rock-krawler-rkrrk06014p-4-5in-rear-coil-springs-jeep-wrangler-jku","provider":"Black Ops Auto Works","version":"1.0","type":"link"}